/*

   BLIS
   An object-based framework for developing high-performance BLAS-like
   libraries.

   Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are
   met:
    - Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    - Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    - Neither the name of The University of Texas nor the names of its
      contributors may be used to endorse or promote products derived
      from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#ifdef WIN32
#include <io.h>
#else
#include <unistd.h>
#endif
#include "blis.h"
#include "cblas.h"

#define CBLAS
//#define FILE_IN_OUT
//#define PRINT
#define MATRIX_INITIALISATION

int main( int argc, char** argv )
{
        obj_t a, b, c;
        obj_t c_save;
        obj_t alpha, beta;
        dim_t m, n, k;
        dim_t p;
        dim_t p_begin, p_end, p_inc;
        int   m_input, n_input, k_input;
        num_t dt;
        int   r, n_repeats;
        trans_t  transa;
        trans_t  transb;
        f77_char f77_transa;
        f77_char f77_transb;

        double dtime;
        double dtime_save;
        double gflops;
#ifdef FILE_IN_OUT
        FILE* fin  = NULL;
        FILE* fout = NULL;
#endif
        //bli_init();
        //bli_error_checking_level_set( BLIS_NO_ERROR_CHECKING );

        n_repeats = 3;

#ifndef PRINT
        p_begin = 200;
        p_end   = 2000;
        p_inc   = 100;

        m_input = -1;
        n_input = -1;
        k_input = -1;
#else
        p_begin = 16;
        p_end   = 16;
        p_inc   = 1;

        m_input = 5;
        k_input = 6;
        n_input = 4;
#endif

        dt = BLIS_SCOMPLEX;
        //dt = BLIS_DCOMPLEX;

        transa = BLIS_NO_TRANSPOSE;
        transb = BLIS_NO_TRANSPOSE;

        bli_param_map_blis_to_netlib_trans( transa, &f77_transa );
        bli_param_map_blis_to_netlib_trans( transb, &f77_transb );

        // printf("BLIS Library version is : %s\n", bli_info_get_version_str());

#ifdef FILE_IN_OUT
        if (argc < 3)
        {
            printf("Usage: ./test_gemm_XX.x input.csv output.csv\n");
            exit(1);
        }
        fin = fopen(argv[1], "r");
        if (fin == NULL)
        {
            printf("Error opening the file %s\n", argv[1]);
            exit(1);
        }
        fout = fopen(argv[2], "w");
        if (fout == NULL)
        {
            printf("Error opening output file %s\n", argv[2]);
            exit(1);
        }

        fprintf(fout, "m\t k\t n\t cs_a\t cs_b\t cs_c\t gflops\t GEMM_Algo\n");
        printf("~~~~~~~~~~_BLAS\t m\t k\t n\t cs_a\t cs_b\t cs_c \t gflops\t GEMM_Algo\n");

        inc_t cs_a;
        inc_t cs_b;
        inc_t cs_c;

        while (fscanf(fin, "%lld %lld %lld %lld %lld %lld\n", &m, &k, &n, &cs_a, &cs_b, &cs_c) == 6)
          {
            if ((m > cs_a) || (k > cs_b) || (m > cs_c)) continue; // leading dimension should be greater than number of rows

            bli_obj_create( dt, 1, 1, 0, 0, &alpha);
            bli_obj_create( dt, 1, 1, 0, 0, &beta );

            bli_obj_create( dt, m, k, 1, cs_a, &a );
            bli_obj_create( dt, k, n, 1, cs_b, &b );
            bli_obj_create( dt, m, n, 1, cs_c, &c );
            bli_obj_create( dt, m, n, 1, cs_c, &c_save );
#ifdef MATRIX_INITIALISATION
            bli_randm( &a );
            bli_randm( &b );
            bli_randm( &c );
#endif
            bli_obj_set_conjtrans( transa, &a);
            bli_obj_set_conjtrans( transb, &b);

            //bli_setsc( 0.0, -1, &alpha );
            //bli_setsc( 0.0, 1, &beta );

            bli_setsc( -1, 0.0, &alpha );
            bli_setsc( 1, 0.0, &beta );

#else
        for ( p = p_begin; p <= p_end; p += p_inc )
        {
                if ( m_input < 0 ) m = p * ( dim_t )abs(m_input);
                else               m =     ( dim_t )    m_input;
                if ( n_input < 0 ) n = p * ( dim_t )abs(n_input);
                else               n =     ( dim_t )    n_input;
                if ( k_input < 0 ) k = p * ( dim_t )abs(k_input);
                else               k =     ( dim_t )    k_input;

                bli_obj_create( dt, 1, 1, 0, 0, &alpha );
                bli_obj_create( dt, 1, 1, 0, 0, &beta );

                bli_obj_create( dt, m, k, 0, 0, &a );
                bli_obj_create( dt, k, n, 0, 0, &b );
                bli_obj_create( dt, m, n, 0, 0, &c );
                bli_obj_create( dt, m, n, 0, 0, &c_save );
#ifdef MATRIX_INITIALISATION

                bli_randm( &a );
                bli_randm( &b );
                bli_randm( &c );
#endif
                bli_obj_set_conjtrans( transa, &a );
                bli_obj_set_conjtrans( transb, &b );

                bli_setsc(  (0.9/1.0), 0.2, &alpha );
                bli_setsc( -(1.1/1.0), 0.3, &beta );

#endif
                bli_copym( &c, &c_save );

                dtime_save = DBL_MAX;

                for ( r = 0; r < n_repeats; ++r )
                {
                    bli_copym( &c_save, &c );

                    dtime = bli_clock();


#ifdef PRINT
                    bli_printm( "a", &a, "%4.1f", "" );
                    bli_printm( "b", &b, "%4.1f", "" );
                    bli_printm( "c", &c, "%4.1f", "" );
#endif

#ifndef CBLAS
    
                    if ( bli_is_scomplex( dt ) )
                      {
                        f77_int  mm     = bli_obj_length( &c );
                        f77_int  kk     = bli_obj_width_after_trans( &a );
                        f77_int  nn     = bli_obj_width( &c );
                        f77_int  lda    = bli_obj_col_stride( &a );
                        f77_int  ldb    = bli_obj_col_stride( &b );
                        f77_int  ldc    = bli_obj_col_stride( &c );
                        scomplex*  alphap = bli_obj_buffer( &alpha );
                        scomplex*  ap     = bli_obj_buffer( &a );
                        scomplex*  bp     = bli_obj_buffer( &b );
                        scomplex*  betap  = bli_obj_buffer( &beta );
                        scomplex*  cp     = bli_obj_buffer( &c );

                        cgemm3m_( &f77_transa,
                                &f77_transb,
                                &mm,
                                &nn,
                                &kk,
                                alphap,
                                ap, &lda,
                                bp, &ldb,
                                betap,
                                cp, &ldc );
                      }
                    else if ( bli_is_dcomplex( dt ) )
                      {
                        f77_int  mm     = bli_obj_length( &c );
                        f77_int  kk     = bli_obj_width_after_trans( &a );
                        f77_int  nn     = bli_obj_width( &c );
                        f77_int  lda    = bli_obj_col_stride( &a );
                        f77_int  ldb    = bli_obj_col_stride( &b );
                        f77_int  ldc    = bli_obj_col_stride( &c );
                        dcomplex*  alphap = bli_obj_buffer( &alpha );
                        dcomplex*  ap     = bli_obj_buffer( &a );
                        dcomplex*  bp     = bli_obj_buffer( &b );
                        dcomplex*  betap  = bli_obj_buffer( &beta );
                        dcomplex*  cp     = bli_obj_buffer( &c );

                        zgemm3m_( &f77_transa,
                                &f77_transb,
                                &mm,
                                &nn,
                                &kk,
                                alphap,
                                ap, &lda,
                                bp, &ldb,
                                betap,
                                cp, &ldc );
                      }
#else
                    if ( bli_is_scomplex( dt ) ){
                        scomplex*   ap     = bli_obj_buffer( &a );
                        scomplex*   bp     = bli_obj_buffer( &b );
                        scomplex*   cp     = bli_obj_buffer( &c );    
                        scomplex*   alphap = bli_obj_buffer( &alpha );
                        scomplex*   betap  = bli_obj_buffer( &beta );
                        cblas_cgemm3m( CblasColMajor,
                                       CblasNoTrans,
                                       CblasNoTrans,
                                       m,
                                       n,
                                       k,
                                       (const void*)alphap,
                                       ap, m,
                                       bp, k,
                                       (const void*)betap,
                                       cp, m );
                    }else if (bli_is_dcomplex(dt)){
                        dcomplex*   ap     = bli_obj_buffer( &a );
                        dcomplex*   bp     = bli_obj_buffer( &b );
                        dcomplex*   cp     = bli_obj_buffer( &c );    
                        dcomplex*    alphap = bli_obj_buffer( &alpha );
                        dcomplex*    betap  = bli_obj_buffer( &beta );
                        cblas_zgemm3m( CblasColMajor,
                                       CblasNoTrans,
                                       CblasNoTrans,
                                       m,
                                       n,
                                       k,
                                       (const void*)alphap,
                                       ap, m,
                                       bp, k,
                                       (const void*)betap,
                                       cp, m );
                    }
#endif    

#ifdef PRINT
                        bli_printm( "c after", &c, "%4.6f", "" );
                        exit(1);
#endif

                        dtime_save = bli_clock_min_diff( dtime_save, dtime );
                }

                gflops = ( 2.0 * m * k * n ) / ( dtime_save * 1.0e9 );

                gflops *= 4.0; //to represent complex ops in gflops

#ifdef BLIS
                printf( "data_gemm_blis" );
#else
                printf( "data_gemm_%s", BLAS );
#endif

#ifdef FILE_IN_OUT

                printf("%6lu \t %4lu \t %4lu \t %4lu \t %4lu \t %4lu \t %6.3f\n", \
                        ( unsigned long )m,
                        ( unsigned long )k,
                       ( unsigned long )n, (unsigned long)cs_a, (unsigned long)cs_b, (unsigned long)cs_c,  gflops);


                fprintf(fout, "%6lu \t %4lu \t %4lu \t %4lu \t %4lu \t %4lu \t %6.3f \n", \
                        ( unsigned long )m,
                        ( unsigned long )k,
                        ( unsigned long )n, (unsigned long)cs_a, (unsigned long)cs_b, (unsigned long)cs_c,  gflops);
                fflush(fout);

#else
        printf( "( %2lu, 1:4 ) = [ %4lu %4lu %4lu %7.2f ];\n",
                        ( unsigned long )(p - p_begin)/p_inc + 1,
                        ( unsigned long )m,
                        ( unsigned long )k,
                        ( unsigned long )n, gflops );
#endif
                bli_obj_free( &alpha );
                bli_obj_free( &beta );

                bli_obj_free( &a );
                bli_obj_free( &b );
                bli_obj_free( &c );
                bli_obj_free( &c_save );
        }

        //bli_finalize();
#ifdef FILE_IN_OUT
        fclose(fin);
        fclose(fout);
#endif
        return 0;
}
